stevens, who was killed in libya. on iran, the president said the u.s. would do what they must to prevent iran from acquiring a nuclear weapon. his remarks were about 30 minutes. [applause] >> on behalf of the general assembly, i would be honored to welcome to the united nations, his excellency, barack obama, president of united states of america and invite him to address the assembly. >> mr. president, mr. secretary-general, fellow delegates, ladies and gentlemen, i would like to begin today by telling you about an american named chris stevens. chris was born in a town in california. the son of a lawyer and a musician.